<!DOCTYPE html>
<p>Try editing lines in the second column. The caret should be
    visible, and there should also be no junk rectangles below the
    first column.</p>
<div style="position:absolute; left:100px; top:100px; padding:10px; columns:2; column-gap:0; column-fill:auto; line-height:20px; width:400px; height:100px; background:yellow;" contenteditable>
    line1<br>
    line2<br>
    line3<br>
    line4<br>
    line5<br>
    line6<br>
    <span id="target">line7</span><br>
    line8<br>
</div>
<script>
if (window.eventSender && window.internals) {
    eventSender.mouseMoveTo(320, 140);
    eventSender.mouseDown();
    eventSender.mouseUp();
}
</script>
